Powerplant
Engines enrolled on JSSI Complete engine program.
Two Williams FJ44-3A turbofan engines are installed, one on each side of the rear fuselage in easily accessible nacelles. This engine is a medium bypass, twin-spool design with 5 compression stages and 3 turbine stages and produces 2,8200 pounds (12.54 kN) of takeoff thrust at sea level, static conditions, flat rated up to 79° F (26°C).
Dual channel Full Authority Digital Engine Controls (FADECs) provide automation and efficiency in engine management. Detents in the throttle quadrant for takeoff (TO), maximum continuous (MCT), high speed cruise (CRU) give pilots the optimal power settings for each phase of flight based on ambient conditions. The system also provides time-limited dispatch (TLD), diagnostics, and engine synchronization. Electrical power for the FADECs comes from engine driven permanent magnet alternators (PMAs) rectified to DC. There are two PMAs mounted to each engine. In the event that both PMAs fail on one engine, the FADEC on that side will draw from main DC power.
The FJ44-3A engine incorporates a modular design and multiple borescope ports for easier maintenance and inspections. Engine overhaul is required at 4,000 hour intervals. A continuous loop fire detection system monitors the nacelle area to detect and warn if a fire occurs. A two-shot fire extinguishing system is supplied.
